203021111121323 has 16 divisors (see below), whose sum is σ = 224512679812992. Its totient is φ = 182035419336000.

The previous prime is 203021111121293. The next prime is 203021111121391. The reversal of 203021111121323 is 323121111120302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 203021111121323 - 2²² = 203021106927019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203021111121923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188014868 + ... + 189091598.

It is an arithmetic number, because the mean of its divisors is an integer number (14032042488312).

Almost surely, 2^{203021111121323} is an apocalyptic number.

203021111121323 is a deficient number, since it is larger than the sum of its proper divisors (21491568691669).

203021111121323 is a wasteful number, since it uses less digits than its factorization.

203021111121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311626.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 203021111121323 its reverse (323121111120302), we get a palindrome (526142222241625).

The spelling of 203021111121323 in words is "two hundred three trillion, twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, three hundred twenty-three".